Aehr Test Systems, Inc. is a US-based provider of test solutions for testing, burning-in, and stabilizing semiconductor devices. The company's systems are used to test devices in wafer level, singulated die, and package part form. Its products primarily serve manufacturers of artificial intelligence processors, silicon carbide power semiconductors, silicon photonics, and memory integrated circuits.
Aehr Test Systems has a very high customer concentration. Revenues from the Company's five largest customers accounted for approximately 70%, 77% and 93% of net revenues in fiscal 2026, 2025 and 2024, respectively. During fiscal 2026, three customers accounted for approximately 26%, 14% and 11% of net revenues; during fiscal 2025, two customers accounted for approximately 39% and 15%; and during fiscal 2024, two customers accounted for approximately 67% and 17%. No other customer accounted for more than 10% of net revenues in any of these periods. The Company expects sales to a limited number of customers to continue to account for a high percentage of net revenues for the foreseeable future, and revenues from significant customers may fluctuate significantly from quarter to quarter.